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Test Code UNA Sodium, Urine, Random, LAB444

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements


Preferred: Random urine specimen

Specimen Volume: 0.2 mL from a random urine collection.

Stability: Store at 2-8ºC or frozen for delayed analysis.

Reference Values

No established reference values

Useful For

Urinary sodium can be diagnostically useful in helping to determine the route of sodium loss. A low urine sodium concentration (<10 mEq/L) indicates extrarenal sodium loss, whereas the presence of high concentration of sodium indicates renal salt wasting or adrenal insufficiency.

Day(s) Test Set Up

Monday through Sunday


Indirect Potentiometric

Test Classification and CPT Coding